| 肖繁荣,史海涛,孙亮.2014.四眼斑水龟个体大小和体形的两性异形.动物学杂志,49(4):528-535. |
| 四眼斑水龟个体大小和体形的两性异形 |
| Sexual Dimorphism in Body Size and Shape in the Four-eyed Spotted Turtle Sacalia quadriocellata |
| 投稿时间：2013-11-12 修订日期：2014-07-02 |
| DOI：10.13859/j.cjz.201404009 |
| 中文关键词: 四眼斑水龟 两性异形 性选择 生育力选择 |
| 英文关键词:Sacalia quadriocellata Sexual dimorphism Sexual selection Fecundity selection |
| 基金项目:国家自然科学基金项目(No. 31372228) |
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| 中文摘要: |
| 身体大小和身体形状性二态广泛存在于动物界。为了繁殖,雌性腹部体积比雄性大,而雄性为了交配成功具有比雌性更有助于提高运动能力的形态特征。用采自海南琼中湾岭的43只(22♀♀21♂♂)成体四眼斑水龟(Sacalia quadriocellata),通过测量表征身体大小、甲壳形状、甲壳开口以及头部等局部形态特征的19个指标,研究该物种的身体大小和形状性二态。结果表明：相对于背甲长,四眼斑水龟雌性的腹部体积比雄性大；雄性的甲壳开口和头部比雌性大,后肢比雌性长、泄殖腔比雌性靠后,这些特征有助于雄性交配成功。研究表明四眼斑水龟存在身体大小和形状性二态。 |
| 英文摘要: |
| Sexual dimorphism of body size and body shape widely exists in the animal kingdom. Generally speaking, females should exhibit a greater abdominal volume than males to hold the progeny, when compared with females, males should exhibit more developed attributes that enhance mobility and mating success. We studied sexual dimorphism of body size and body shape in Sacalia quadriocellata based on 43 (22♀♀21♂♂) adults collected from Qiongzhong county in Hainan province. We measured 19 morphological variables on these specimens. As expected, our data indicate that the shell provides a larger abdominal volume relative to shell size in females than in males. In males, larger shell openings offer more freedom to the limbs and to the tail, longer hind limbs enhance mobility, bigger head might serve to clam the female, and the more posterior cloaca in the tail most likely facilitate copulation. All of these characteristics presumably enhance mating success. Our main conclusion is that sexual dimorphism of body size and body shape existed in Sacalia quadriocellata. |
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